package com.mall.common;

import org.codehaus.jackson.annotate.JsonIgnore;
import org.codehaus.jackson.map.annotate.JsonSerialize;

import java.io.Serializable;

/**
 * Created by xiaoyao on 2017/8/14.
 */
@JsonSerialize(include =  JsonSerialize.Inclusion.NON_NULL)
//保证序列化json时，如果是null的对象，key也会消失；
public class ServerResponse<T> implements Serializable {
    private int status;
    private String msg;
    private T data;

    private ServerResponse(int status){
        this.status=status;
    }
    private ServerResponse(int status,T data){
        this.status=status;
        this.data = data;
    }
    private ServerResponse(int status,String msg){
        this.status=status;
        this.msg = msg;
    }
    private ServerResponse(int status,String msg,T data){
        this.status=status;
        this.msg = msg;
        this.data = data;
    }


    //如果status==0,响应成功，返回true，否则返回false;
    //在ResponseCode中对status的返回值，进行扩充。
    @JsonIgnore
    public boolean isSuccess() {
        return this.status==ResponseCode.SUCCESS.getCode();
    }
    public int getStatus(){
        return status;
    }
    public String getMsg(){
        return msg;
    }
    public T getData(){
        return data;
    }
    //对外开放静态的方法
    //不需要参数，返回一个status
    public static <T> ServerResponse<T> createBySuccess(){
        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode());
    }
    public static <T> ServerResponse<T> createBySuccessMessage(String msg){
        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode(),msg);
    }
    //创建成功的服务器响应，把数据传过去
    public static <T> ServerResponse<T> createBySuccess(T data){
        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode(),data);
    }
    public static <T> ServerResponse<T> createBySuccess(String msg,T data){
        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode(),msg,data);
    }


    public static <T> ServerResponse<T> createByError(){
        return new ServerResponse<T>(ResponseCode.ERROR.getCode(),ResponseCode.ERROR.getDesc());
    }
    public static <T> ServerResponse<T> createByErrorMessage(String errorMessage){
        return new ServerResponse<T>(ResponseCode.ERROR.getCode(),errorMessage);
    }
    public static <T> ServerResponse<T> createByErrorCodeMessage(int errorCode,String errorMessage){
        return new ServerResponse<T>(errorCode,errorMessage);
    }
}
